Improvement in lamp-cones



\ Mi B. DYOTT.

Cone for Lamps.

No. 37,956. Patented Ma'r ch 24. 1863 N. PETERS. Phctv-Lmwgn hor. Washington, DC

UNITED STATES PATENT OFFICE.

M. B. DYOTT, OF PHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN LAM P-CGNES.

Specification forming part of Letters Patent No. 37,956, dated March 24, 1863.

To all whom it may concern:

Be it known that I, M. B. DYOTT, of Philadelphia, 1n the county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in the Construction of Cones or Deflectors for Ooal'Oil Lamp- Burners; and 1 do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the acconr panying drawings, making a part ofthis specification, in which 7 Figure l is a side view of my invention; Fig. 2, a vertical section of the same, taken in the line at a, Fig. 3; Fig. 3, a plan or top View of the same.

Similar letters of reference indicate corre sponding parts in the several figures This invention consists in corrugating the side of the cone or deflector, or swaging or indenting the same in such a manner that the chimney, which rests upon the base of the cone or deflector, cannot, in consequence of any lateral movement or play, cover any of the apertures in the cone through which air is admitted to the flame at the outer side of the cone, a contingency which frequently occurs with the cones in ordinary use.

To enable those skilled in the art to fully understand and construct my invention, I will proceed to describe it.

A represents the upper or main portion of the cone or deflector, and B the base of the same, the latter, as usual, projecting out horizontally from the main portion, as shown clearly in Figs. 1 and 2. The side of the upper part, A, of the cone is swaged, so as to form a series of upright indentations, a, and prominences b, and the base B of the cone, at the bottom of each indentation. is perforated with a hole, 0. These holes 0, it will be seen by referring to Fig. 3, do not extend out quite as far as the prominences b. The base of the glass chimney rests on the base B of the cone or deflector, and if the chimney precisely fits the cone all the prominences b of the latter will be in contact with the inner surface of the base of the chimney. (See Fig. 3, in which the chimney is shown in red.) If the chimney be larger in diameter than the upper part, A, of the cone no part of the base of the chimney can cover any of the holes a, because it is impossible for the base of the chimney to reach the holes, the prominences 11 serving as fenders. This will be fully understood by referring to Fig. 3. The air, then, it will be seen, may at all times pass up through the holes 0 into the chimney and be brought in contact with the flame above the cone.

Air hitln-rto has been admitted into the chimneys of lamps at the outer side of the cones in two dili'erent ways. The original plan consisted in perforating the base B of the cone near the lower end of the upper part, A, the latter having a. smooth exterior. By this arrangement, however, the base of the chimney would frequently cover some of the holes and admit air at one side of the cone and cut it off at the opposite side, thereby causing the flame to be imperfectly supplied l with air. In the other plan the base B, in-

stead of being perforated, is corrugated radially, the base of the chimney resting 011 the prominences, while the recesses or channels between the prominences form air-duets to admit air underneath the base of the chim ney and up within the latter. In this arrangement, as in the other, the base of the chimney will .cut off the supply of air at any point where it is brought in contact with the upper part, A, of the cone, and consequently the same disadvantage attends the latter as the former arrangement.

My invention, it will be. seen, fully obviates this difiiculty,'tor the base of the chimney, owing to the prominences b and the indentations 0., cannot in any event cover the holes 0, which are made in the cone at the bottoms of the indentations.

Having thus described my invention, whatI claim as new, and desire to secure by Letters Patent, is

Corrugatin g or swaging the sides of the cone or deflector so as to form prominences or indentations by which the necessary supply of air is prevented from being intercepted or cut off, whether admitted through perforations in the base of the cone or through airducts formed by corrugations or prominences upon the base of the cone, substantially as and for the purpose above set forth.

M. B. DYOTT.

Witnesses:

JOHN BELLESJEAN, J AS. OoNDY. 

